Lead DBA
Lead DBA Interview Questions and Answers
Q1. What is your name ? And how you build our slow old system.
My name is John Smith. I improved the slow old system by optimizing queries, upgrading hardware, and implementing performance tuning techniques.
Optimized database queries by rewriting them and adding appropriate indexes
Upgraded hardware to improve system performance
Implemented performance tuning techniques such as caching and query optimization
Identified and resolved bottlenecks in the system
Implemented database monitoring and alerting to proactively address performance issue...read more
Q2. What is rational database, etc..
A relational database is a type of database that organizes data into tables with rows and columns.
A relational database is based on the relational model, which uses tables to store and organize data.
Tables consist of rows and columns, where each row represents a record and each column represents a field or attribute.
Data in a relational database is structured and can be easily accessed and manipulated using SQL (Structured Query Language).
Relationships between tables are esta...read more
Q3. What is sql
SQL stands for Structured Query Language, used to manage and manipulate relational databases.
SQL is a programming language used to manage and manipulate relational databases.
It is used to create, modify, and query databases.
SQL is used in various applications such as web development, data analysis, and business intelligence.
Examples of SQL-based database management systems include MySQL, Oracle, and Microsoft SQL Server.
Q4. Types of db
There are mainly four types of databases: relational, NoSQL, column-family, and document.
Relational databases store data in tables with predefined relationships between them.
NoSQL databases are non-relational and can handle unstructured data.
Column-family databases store data in columns instead of rows.
Document databases store data in documents, usually in JSON format.
Examples of relational databases include MySQL and Oracle.
Examples of NoSQL databases include MongoDB and Cas...read more
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